AB initio study of electric transport and interlayer exchange coupling in Fe-Si-Fe systems

H. C. Herper, P. Weinberger, L. Szunyogh, C. Sommers, P. Entel

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present a first principles study of the magnetoresistance (MR) perpendicular to the planes of atoms and the interlayer exchange coupling (IEC) in Fe-Si-Fe trilayers. In both cases the dependence on the number of spacer layers is investigated, whereby the spacer thickness ranges between 3 and 21 Å for the IEC and extends to 33 Å for the MR in order to obtain the asymptotic behavior. Additionally, the influence of alloy formation at the interfaces on the MR and the IEC is examined. The calculations of the electronic structure are performed within the fully relativistic spin-polarized screened Korringa-Kohn-Rostoker method and the transport properties are derived from the Kubo-Greenwood equation. Our results give evidence that interdiffusion is one of the origins of the small MR, which is observed experimentally in Fe/Si/Fe trilayers. AFM coupling occurs for spacers thicker than 4 Å which is in accordance with the experimental findings. It seems that interdiffusion stabilizes AFM coupling in Fe-Si-Fe trilayers.

Original languageEnglish
Pages (from-to)523-532
Number of pages10
JournalPhase Transitions
Volume76
Issue number4-5
DOIs
Publication statusPublished - Jan 1 2003

Fingerprint

Exchange coupling
Magnetoresistance
interlayers
spacers
atomic force microscopy
Transport properties
Electronic structure
Atoms
transport properties
electronic structure
atoms

Keywords

  • Electrical transport
  • First-principles calculations
  • Magnetic heterostructures

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

AB initio study of electric transport and interlayer exchange coupling in Fe-Si-Fe systems. / Herper, H. C.; Weinberger, P.; Szunyogh, L.; Sommers, C.; Entel, P.

In: Phase Transitions, Vol. 76, No. 4-5, 01.01.2003, p. 523-532.

Research output: Contribution to journalArticle

Herper, H. C. ; Weinberger, P. ; Szunyogh, L. ; Sommers, C. ; Entel, P. / AB initio study of electric transport and interlayer exchange coupling in Fe-Si-Fe systems. In: Phase Transitions. 2003 ; Vol. 76, No. 4-5. pp. 523-532.
@article{e9e463b7d2834577af04a5836446f270,
title = "AB initio study of electric transport and interlayer exchange coupling in Fe-Si-Fe systems",
abstract = "We present a first principles study of the magnetoresistance (MR) perpendicular to the planes of atoms and the interlayer exchange coupling (IEC) in Fe-Si-Fe trilayers. In both cases the dependence on the number of spacer layers is investigated, whereby the spacer thickness ranges between 3 and 21 {\AA} for the IEC and extends to 33 {\AA} for the MR in order to obtain the asymptotic behavior. Additionally, the influence of alloy formation at the interfaces on the MR and the IEC is examined. The calculations of the electronic structure are performed within the fully relativistic spin-polarized screened Korringa-Kohn-Rostoker method and the transport properties are derived from the Kubo-Greenwood equation. Our results give evidence that interdiffusion is one of the origins of the small MR, which is observed experimentally in Fe/Si/Fe trilayers. AFM coupling occurs for spacers thicker than 4 {\AA} which is in accordance with the experimental findings. It seems that interdiffusion stabilizes AFM coupling in Fe-Si-Fe trilayers.",
keywords = "Electrical transport, First-principles calculations, Magnetic heterostructures",
author = "Herper, {H. C.} and P. Weinberger and L. Szunyogh and C. Sommers and P. Entel",
year = "2003",
month = "1",
day = "1",
doi = "10.1080/0141159021000051280",
language = "English",
volume = "76",
pages = "523--532",
journal = "Phase Transitions",
issn = "0141-1594",
publisher = "Taylor and Francis Ltd.",
number = "4-5",

}

TY - JOUR

T1 - AB initio study of electric transport and interlayer exchange coupling in Fe-Si-Fe systems

AU - Herper, H. C.

AU - Weinberger, P.

AU - Szunyogh, L.

AU - Sommers, C.

AU - Entel, P.

PY - 2003/1/1

Y1 - 2003/1/1

N2 - We present a first principles study of the magnetoresistance (MR) perpendicular to the planes of atoms and the interlayer exchange coupling (IEC) in Fe-Si-Fe trilayers. In both cases the dependence on the number of spacer layers is investigated, whereby the spacer thickness ranges between 3 and 21 Å for the IEC and extends to 33 Å for the MR in order to obtain the asymptotic behavior. Additionally, the influence of alloy formation at the interfaces on the MR and the IEC is examined. The calculations of the electronic structure are performed within the fully relativistic spin-polarized screened Korringa-Kohn-Rostoker method and the transport properties are derived from the Kubo-Greenwood equation. Our results give evidence that interdiffusion is one of the origins of the small MR, which is observed experimentally in Fe/Si/Fe trilayers. AFM coupling occurs for spacers thicker than 4 Å which is in accordance with the experimental findings. It seems that interdiffusion stabilizes AFM coupling in Fe-Si-Fe trilayers.

AB - We present a first principles study of the magnetoresistance (MR) perpendicular to the planes of atoms and the interlayer exchange coupling (IEC) in Fe-Si-Fe trilayers. In both cases the dependence on the number of spacer layers is investigated, whereby the spacer thickness ranges between 3 and 21 Å for the IEC and extends to 33 Å for the MR in order to obtain the asymptotic behavior. Additionally, the influence of alloy formation at the interfaces on the MR and the IEC is examined. The calculations of the electronic structure are performed within the fully relativistic spin-polarized screened Korringa-Kohn-Rostoker method and the transport properties are derived from the Kubo-Greenwood equation. Our results give evidence that interdiffusion is one of the origins of the small MR, which is observed experimentally in Fe/Si/Fe trilayers. AFM coupling occurs for spacers thicker than 4 Å which is in accordance with the experimental findings. It seems that interdiffusion stabilizes AFM coupling in Fe-Si-Fe trilayers.

KW - Electrical transport

KW - First-principles calculations

KW - Magnetic heterostructures

UR - http://www.scopus.com/inward/record.url?scp=0012486318&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0012486318&partnerID=8YFLogxK

U2 - 10.1080/0141159021000051280

DO - 10.1080/0141159021000051280

M3 - Article

AN - SCOPUS:0012486318

VL - 76

SP - 523

EP - 532

JO - Phase Transitions

JF - Phase Transitions

SN - 0141-1594

IS - 4-5

ER -